Nano Meters:
A nano meter is 1 x 10^-9 or 1 billionth of a meter. 10 nano meters is so small it is roughly half the diameter of a ribosome. Nano meters are also used to describe the size of particles on the atom level. 10 Nano meters is also the thickness of some small prokaryotic cells! Now that's small!. Follow the links to get a better idea of just how small that is.
http://en.wikipedia.org/wiki/Nanoparticle
http://en.wikipedia.org/wiki/10_nanometres
http://en.wikipedia.org/wiki/Nanometre
http://hypertextbook.com/facts/2003/AlonaVorobyov.shtml
A Mole of Atoms:
1 mole is a set number representing 6.022 x 10^23. What an odd number to use for counting isn't it? Why not just use 6 x 10^23? Well 1 mole was a number that represents much more then just a random arbitrary number marking to make counting easier, its actually based on how many atoms are present in 12 grams of carbon-12 which has an atomic weight of 12. This way we can easily weight a sample of a pure element in grams and by comparison analysis we can figure out roughly how many atoms of an element we have!
Follow the links to the side for more information on what a mole is.
http://en.wikipedia.org/wiki/Mole_(unit)
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